source: vendor/bash/3.1-p17/examples/scripts/fixfiles.bash

#! /bin/bash
#
# From: c2a192@ugrad.cs.ubc.ca (Kazimir Kylheku)
# Newsgroups: comp.unix.shell,comp.os.linux.misc
# Subject: GNU Bash Script to fix filenames
# Date: 28 Mar 1996 14:54:43 -0800
# Organization: Computer Science, University of B.C., Vancouver, B.C., Canada
#
#This is a script which takes a list of directories, descends through each one
#and ``corrects'' filenames that:
#
#   -   contain filename globbing characters: * ? [ ]
#   -   quote characters: ' "
#   -   control characters: 0-31 (127 is not dealt with---oops)
#   -   - or + as the first character
#
# The GNU version of 'tr' is required. Also requires 'sed'.
#
# Script to process a given list of directories recursively
# and rename each file to something that is reasonable.
#
# The rules are:
#
# 1. replace each space, [, ], *, ", and ' character in the name with a
#    period.
# 2. replace each control character 1..31 with a printable character obtained
#    by adding 64 to the ascii value. ^A becomes A, ^B becomes B and so on.
# 3. replace a - or + occuring at the beginning of the name with a #
#
# 4. if the resulting name has been changed in any way, then
# 5.    if a file of the new name already exists, then
# 6.            add a . to the new name and goto step 5.
# 7. rename the old name to the new name
#
# written by Kaz Kylheku <kaz@cafe.net>
# March 1996
# Vancouver, Canada
#
# requires GNU 'bash', GNU 'tr', and some sort of 'sed' program.
#
# minimal conversion to bash v2 syntax done by Chet Ramey

processfile()
{
        new_name="`echo -n $1 | tr '\173\175\052\077\042\047 ' '.......' |
                        tr '[\000-\037]' '[\100-\137]' |
                        sed -e 's/^-/#/' -e 's/+/#/'`"
        if [ "$new_name" != "$1" ] ; then
                while [ -e "$new_name" ] ; do
                        new_name="${new_name}."
                done
                echo changing \"$1\" to \"$new_name\" in `pwd`
                mv -- "$1" "$new_name"
        fi
}

processdir()
{
        set -f
        local savepwd="$PWD"
        if cd "$1" ; then
                set +f
                for file in * ; do
                        set -f
                        if [ "$file" != "." ] && [ "$file" != ".." ] ; then
                                if [ -L "$file" ] ; then
                                        echo "skipping symlink" $file in `pwd`
                                elif [ -d "$file" ] ; then
                                        processdir "$file"
                                elif [ -f "$file" ] ; then
                                        processfile "$file"
                                fi
                        fi
                done
                cd "$savepwd"
        fi
}

shopt -s nullglob dotglob

if [ $# = 0 ] ; then
        echo "$0: must specify a list of directories" >&2
        echo "$0: usage: $0 directory [directory ...]" >&2
        exit 2
fi

while [ $# != 0 ] ; do
        processdir "$1"
        shift
done

exit 0